We expose the state of the art in the topic of one-way delay measurement in both traditional and software-defined networks. A representative range of standard mechanisms and recent research works, including OpenFlow and Programming Protocol-independent Packet Processors (P4)-based schemes, are covered. We classify them, discuss their advantages and drawbacks, and compare them according to their application environment, accuracy, cost, and robustness. The discussion extends to the reuse of traditional schemes in software-defined networks and the benefits and limitations of the latter with respect to reducing the overhead of network wide measurements. We conclude with a summary of learned lessons and open challenges for future work.

中文翻译：

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从传统网络到 SDN 的单向延迟测量

我们在传统网络和软件定义网络中的单向延迟测量主题中展示了最先进的技术。涵盖了一系列具有代表性的标准机制和最近的研究工作，包括 OpenFlow 和基于编程协议无关的数据包处理器 (P4) 的方案。我们对它们进行分类，讨论它们的优缺点，并根据它们的应用环境、准确性、成本和鲁棒性进行比较。讨论扩展到软件定义网络中传统方案的重用以及后者在减少网络范围测量的开销方面的好处和限制。最后，我们总结了吸取的经验教训和未来工作的开放挑战。